Updates on California wildfires.
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Updated: 8:17 a.m. Aug. 1
First discovered: 18 hours ago, 2:13 p.m. July 31
Initial location: East Grade Road, Northwest of Lake Henshaw, San Diego County, Calif.
Fire unit: Unified Command: Cal Fire San Diego Unit and USFS
Fire type: Wildfire
Fire name: Grade Fire
Grade Fire initially started 2:13 p.m. July 31 on East Grade Road, Northwest of Lake Henshaw in San Diego County, California.
As of Saturday morning, 670 acres of land had been consumed by it. By Saturday morning, the fire crew managed to contain 15% of the fire. There is currently no information on the cause of the fire.
Fire containment
What does it mean for a fire to be 15% contained?
The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 15% of the wildfire is contained from spreading, while 85% is still uncontrolled.
Containment is part of a larger plan for managing a wildfire. It is normally expressed as a percentage and it refers to how much of the fire perimeter has been surrounded/enclosed by a control line that firefighters create. The containment percentage indicates a certain level of control, but it doesn’t always correlate to safety level. Also, it’s important to note that containment doesn’t mean a fire is out.
How is containment measured?
The incident’s central command constantly receives progress reports from firefighters on the ground. As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage. The percentage tells the public how much of the fire perimeter is believed to not go beyond the control lines.
Source: Cal Fire
United Robots Sacramento
This story was originally published August 1, 2026 at 6:29 AM.